Delegates from 12 countries are visiting Dounreay this week as part of an initiative by the International Atomic Energy Agency.
They are in Scotland to take part in the first research co-ordination meeting of an IAEA group set up to share best practice in the management and organisation of decommissioning.
The five-day meeting is being held in Thurso, Caithness, and attended by experts in decommissioning from Germany, Norway, Ukraine, Denmark, Hungary, Czech Republic, Russia, Slovakia, Lithuania, Finland, South Africa and the UK.
UKAEA, parent body of Dounreay Site Restoration Ltd, is among those giving presentations to the meeting.
The meeting includes half-day visits to Dounreay to study decommissioning of the experimental and prototype fast reactors.